3.5 KiB
id | title | challengeType | forumTopicId | dashedName |
---|---|---|---|---|
a8e512fbe388ac2f9198f0fa | 找出包含特定键值对的对象 | 5 | 16092 | wherefore-art-thou |
--description--
创建一个查看对象数组(第一个参数)的函数,并返回具有匹配的名称和值对的所有对象的数组(第二个参数)。 如果要包含在返回的数组中,则源对象的每个名称和值对都必须存在于集合中的对象中。
比如,如果第一个参数是 [{ first: "Romeo", last: "Montague" }, { first: "Mercutio", last: null }, { first: "Tybalt", last: "Capulet" }]
,第二个参数是 { last: "Capulet" }
。
--hints--
whatIsInAName([{ first: "Romeo", last: "Montague" }, { first: "Mercutio", last: null }, { first: "Tybalt", last: "Capulet" }], { last: "Capulet" })
应返回 [{ first: "Tybalt", last: "Capulet" }]
。
assert.deepEqual(
whatIsInAName(
[
{ first: 'Romeo', last: 'Montague' },
{ first: 'Mercutio', last: null },
{ first: 'Tybalt', last: 'Capulet' }
],
{ last: 'Capulet' }
),
[{ first: 'Tybalt', last: 'Capulet' }]
);
whatIsInAName([{ "apple": 1 }, { "apple": 1 }, { "apple": 1, "bat": 2 }], { "apple": 1 })
应返回 [{ "apple": 1 }, { "apple": 1 }, { "apple": 1, "bat": 2 }]
。
assert.deepEqual(
whatIsInAName([{ apple: 1 }, { apple: 1 }, { apple: 1, bat: 2 }], {
apple: 1
}),
[{ apple: 1 }, { apple: 1 }, { apple: 1, bat: 2 }]
);
whatIsInAName([{ "apple": 1, "bat": 2 }, { "bat": 2 }, { "apple": 1, "bat": 2, "cookie": 2 }], { "apple": 1, "bat": 2 })
应返回 [{ "apple": 1, "bat": 2 }, { "apple": 1, "bat": 2, "cookie": 2 }]
。
assert.deepEqual(
whatIsInAName(
[{ apple: 1, bat: 2 }, { bat: 2 }, { apple: 1, bat: 2, cookie: 2 }],
{ apple: 1, bat: 2 }
),
[
{ apple: 1, bat: 2 },
{ apple: 1, bat: 2, cookie: 2 }
]
);
whatIsInAName([{ "apple": 1, "bat": 2 }, { "apple": 1 }, { "apple": 1, "bat": 2, "cookie": 2 }], { "apple": 1, "cookie": 2 })
应返回 [{ "apple": 1, "bat": 2, "cookie": 2 }]
。
assert.deepEqual(
whatIsInAName(
[{ apple: 1, bat: 2 }, { apple: 1 }, { apple: 1, bat: 2, cookie: 2 }],
{ apple: 1, cookie: 2 }
),
[{ apple: 1, bat: 2, cookie: 2 }]
);
whatIsInAName([{ "apple": 1, "bat": 2 }, { "apple": 1 }, { "apple": 1, "bat": 2, "cookie": 2 }, { "bat":2 }], { "apple": 1, "bat": 2 })
应返回 [{ "apple": 1, "bat": 2 }, { "apple": 1, "bat": 2, "cookie":2 }]
。
assert.deepEqual(
whatIsInAName(
[
{ apple: 1, bat: 2 },
{ apple: 1 },
{ apple: 1, bat: 2, cookie: 2 },
{ bat: 2 }
],
{ apple: 1, bat: 2 }
),
[
{ apple: 1, bat: 2 },
{ apple: 1, bat: 2, cookie: 2 }
]
);
whatIsInAName([{"a": 1, "b": 2, "c": 3}], {"a": 1, "b": 9999, "c": 3})
应返回 []
。
assert.deepEqual(
whatIsInAName([{ a: 1, b: 2, c: 3 }], { a: 1, b: 9999, c: 3 }),
[]
);
--seed--
--seed-contents--
function whatIsInAName(collection, source) {
var arr = [];
// Only change code below this line
// Only change code above this line
return arr;
}
whatIsInAName([{ first: "Romeo", last: "Montague" }, { first: "Mercutio", last: null }, { first: "Tybalt", last: "Capulet" }], { last: "Capulet" });
--solutions--
function whatIsInAName(collection, source) {
var arr = [];
var keys = Object.keys(source);
collection.forEach(function(e) {
if(keys.every(function(key) {return e[key] === source[key];})) {
arr.push(e);
}
});
return arr;
}